City officials have given the Boston Free Speech Rally a permit for 100 people to use Boston Common Saturday, but Mayor Martin J. Walsh police will have a “zero tolerance” toward any violence during the event.

The permit, issued this afternoon, allows for the rally to take place from noon to 2 p.m. at the Parkman Bandstand, with setup from 10 to noon and a breakdown from 2 to 3 p.m. The rally will have amplified sound but no other accessories like tents or stages, according to the permit.

Walsh said he was opposed to granting the permit.

“I didn’t want them to get a permit, quite honestly, but we also believe in free speech in our country,” he said at an event. “I didn’t think their message, what I’m hearing that message is, it isn’t wanted here, it’s not wanted in the United States of America. We’ll see what happens Saturday when they get here.”

Police Commissioner William B. Evans said he met with rally organizers as well as counterprotesting organizers earlier today, saying they had a “good conversation” and laid out security parameters. Police are banning any weapons from the Common, including anything that can be used as a weapon like large sticks. Backpacks will be subject to search and rally participants and protesters will be separated by barricades, Evans said

“We don’t want a repeat of what happened in Charlottesville,” Evans said. “Boston is too united, we have a city that doesn’t tolerate hatred and bigotry and we wanted to make it clear to both groups.”

Walsh agreed, saying, ““We’re not going to tolerate any bad behavior there, if we see bad behavior we’ll shut it down … We’re going to have a zero tolerance policy … and that’s for anybody.”